Reader for Well Known Text format

[Andrew Cool]

Hi,

Does anyone have a general reader routine for files in Well Known Text (WKT) format?

In particular, I'm trying to parse this file of Auroral predictions :-

https://services.swpc.noaa.gov/json/ovation_aurora_latest.json

TIA,

Andrew

[Bernat]

This looks like JSON format:

https://www.nv5geospatialsoftware.com/docs/json_parse.html

[Chris Torrence]

Yep, that's JSON alright. I was able to read the data using the new HttpRequest class:

IDL> !version.release
9.0.0

IDL> data = httprequest.get('https://services.swpc.noaa.gov/json/ovation_aurora_latest.json')
IDL> json = data.json()

IDL> json.keys()
[
    "Observation Time",
    "Forecast Time",
    "Data Format",
    "coordinates",
    "type"
]

IDL> coord = (json['coordinates']).toArray()
IDL> help, coord                            
COORD           LONG64    = Array[65160, 3]
IDL> print, min(coord, dim=1)
                     0                   -90                     0
IDL> print, max(coord, dim=1)
                   359                    90                    18

-Chris

NV5 Geospatial Software